Printer



' May 11 1926.

, 1,584,185 G. A. MITCHELL PRINTER Filed sept. '5,

2 Sheets-Sheet l G. A. MITCHELL May 1l 1926.

PRINTER 2 Sheets-Sheet 2 Filed Sept. 5, 1922 rvs GN.N\ n n H -www Nw 4.4 D@ n. .u nn n uuuauuull has' special reference h"-Itisano i specifiedor positive film,

.Patented May 11`, 192e.

GEORGE A.

PRINTER. l

Application led September This invention'has to do with aprinter forprinting positive lm, orthe like, from negativev klm, or the like,

to that general class of printer in which the positive is printed fromthe ne ative througha lens. u

l(fiject of this invention to provide a printer of the general characterabove which will hold the object, or negaprinted from and the object,being printed onto in proper register and so that their movementsexactly correspond. I.

I t is another object of this invention to eliminate, in a printer ofthe character specified, allV gearing, relatively working parts, etc.,between the support and I noving'meansV for the two films, and therebyeliminate numerous difficulties and inconveniences which are common toprinters of this char` acter. .u

.The various objects and featuresof the present invention will be bestand more fully understood from the following detailed description of twotypical embodimentsof the tive film, being invention throughout whichreference is had to the accompanying'drawings, in which:

Fig. 1 is a longitudinal central sectional y view of a pril terembodying the present invention; Fig.'2 is avertical transverse detailsectional vlew of the printer shown in Fig- 1, being a view taken asindicated by line 2-2 on`- Fig. 1; Fig.A 3 is a view similar to Fig. lof another form of printer embodying the present invention; and Fig.#his a view of the printer shown in Fig. 1 taken as .indicated by line 44 on Fig. 3. t

Generally the present invention provides a single member, preferably arotatable cr'l cular member, for supporting both the posi- A tive andngative films, means for illumin at-.a

ing the negative film, means for guiding and holding the 'films inproper supported engagement with said single member, vand a lens betweenthe two film supporting parts of said single member to recelve lightfrom the scope of my invention'as it will boob- 1 the illuminatednegative film and direct it vonto the positive film. For the sake ofconvenience and simplicity I `will hereinafter refer to the presentinvention being used to handle positive and negative films, but by sodoing I do not' wish to sp'ecificallylimit MITCHELL, CE Los ANGELES,CALIEoENIA, AssIGNon 'ro and MITCHELL CAMERA CoRronA'IIoN,y ACoRronATIoN 0E CALIFORNIA.

'5, 1922.v serial No. 586,329. i

vious that it may be usedfor handliiig other objects like or equivalentto lms.

Referring now particularly to Figs. 1 and 2 of tlie-'drawings numeral 10designates,

generally, a single film supportingfmember provided by theinvention;.numeral`11 desilluminating means, letter e ignates,generally,

N designates the negative film, letter P designates the positive-.flm,numeral 12 designates rollers which constitute the means for,

- The member 10 is preferably a circular,

member mounted for rotation In the particular' form. of the inventionnow under consideration the I and two cir or wheel-like, about a fixedaxis.

member 10 comprises a hub 18, cular parts 19 concentric with the hub 18and located on the hub 18 so that they are spaced apart, as clearlyillustrate'din Fig. 2 of the drawings. y The hub 20, Y preferably by 18is mounted on a shaft means of suitable 4ball bearings 21, so ,thateitis freely rotatable.

The shaft 2O is firmly carried by a standard `22 which extends from thebase 23 of the device. Tle printer under consideration being designed tohandlestandard motion picture 19- are provided at their inner edges withteeth 24 adapted to engage the perforations at'- the edges of the films.A film to be-supported by themember 10 is arranged to ex'- tend betweenthe two parts edge portions are supported vby the peripheries of theparts 19 and'so that the teeth 24, extending from the peripheries of theparts 19, cooperate with the perforations at its edges. It is preferredin practice that the member 10 ber so that there is no danger of any ofits parts shifting or moving relative to each other. Driving means forthe member 1 0 In ay comprise a worm 81 mounted on a drive shaft 82 tomesh with a wormwheel on one end of the hub 18. f

The -rollers 12` are idle rollers rotatably carried on shafts 30. The4rollers 12 are be an integral or continuous meml film, the peripheriesof the circular parts spaced, apart'and are related to the member n10 sothat they .operate to guide and hold a portion of the negative film N inproper supported engagement on the member 10. Itl will be'obvious,ofcourse, that the exact amount of negative iilm N held in supported,engagement on the member 104 at a time will depend upon the arrangementand spacing f the rollers 12. In practice the rollers '12 are arrangedand related so that a consider- "able length of negative lilm issupported on the member 10 so thatthepart ofthe nega- .backing plate 14is designed to accurately fit and back up vthe positive film .PV in Asiemounted engagement of vthe member 10; The plate'14 is carried on an arm33 which 'is normally urged toward the film P by fa suitable spring 34,vIt' will be obvious that means other than the-ones herein set forth dll--may loel employed to ideand holdthe s 1n proper mounte lengagement onthe member so', therefore, do not wish it understood-that the" presentinvention isv limited to the specific form of. means-which 'll'havedisclose The illuminatingmeans 11 which l have illustrated inthedrawirigs includes' a source of light 40, al reflector 41 bach of thesource of light, a condenser lens 42 in', front of the source of light,and a suitable housing 43 which houses and carries 'theother parts.

The housing 43 is provided with an aperture 44 at the supported `portionof the negative N, so thatl the light generated at the source of lightjilluminates only the de,- sired part of the negative hlm N. From inv"spection of the drawings it will be obvious how light generated at thesource of light 40 shines directlyon the condenser lens device 42, andhow light from'jthe source `of light 40 is Vreflected tothe condenserlens device 42 by the reflector 41, so that a more or less concentratedshaft of li ht is'di-rected by the lens device through e aperture 44 yonto the desired part of the negative ilm. lAs far as the presentinvention is concerned the illuminating means may be 'of any convenientor desirable type, it being vimportant only that the part of thenegative film desired to be illuminated be ,illumina-ted uniformlyv and,of course, preferably, in-

tensely., With the type of illuminating means herein disclosed it wellthat the `'shaft of light thrown by the condenser lens A device besomewhat larger than the aperture 44 in order. to assure full anduniform illumination of the illuminated Vpart of the negative ilm- N Inthe particular machinek now under con.

sideratio'n the lens device 15 is located be-A tween the supported partyof lthe negative film N andthe supported part of thepositive film T,but is not in aline between them. yThe'lens device 15 is offset from aline between the supported parts ofthe films so as toI avoid the hub 18of the member 10. .ln a t preferred arrangement the lens device 15 isarranged parallellwith a line between thev supported parts of the filmand is odset upwardly, as l have illustrated in the drawings.'` The lens`device 15 may include snit-V ablelensesfO and an adjustable carrier51.g5 Y The carrier 51 isvcarried by a standard 52 which'extends upwardlyfrom the base 23 between the circular parts 19 of the member- 10 andaround the hub 18 ofthe member 10. The carrier 51 is. adjustably held inthe standard 52 by a suitable adjusting screw 53; The lens device 15being offset from the line between the supported parts of thelilm,

l provide reflectors 55 and 56 to'direct the i light from theilluminated part'of the'negative ilm-N to and through the lenses of thelens device, and reflectors 57 and 58 to direct the light lfrom thelenses 50 onto the desired part of 'the supported portion of thepositive film C. The various reectors are preferably prismaticreflectors, as l have illustrated in the drawings. The reflector iscarried by the standard 52 and receives the light directly vfrom theilluminated part of the negative film N and directs it npwardly. Theredector 55 is .carriedby the carrier 51 and receives light from there-Hector 55 and directs. through the lenses 50. The reector 57 is carriedby the carrier 51 and receives light from the lenses 50 and ydirectsitdownwardly. Tlfhe reector 58 isv carried by the standard 52 andreceives the light from the redector 5'? and directs it onto the desiredpart of the positive film P. The arrangement just describedisrparticularly desirable as it makes-fit possible to readily andv:accurately vary 'oradjust the distance `the light has to' travel fromthe negative film N to thepositivelilm P. For the pdr.-v Y Y pose ofregulating the intensity of the light passing `from the negative -llm Ntoy the positive lm P l provide an iris mechanism 60 in the path of thelight preferably in the lens device 15.

From the foregoing description it is believed that the operation of thedevice will lill) be clearly and fully understood. The films f N and Pcan be readily arranged inthe device so that they have portionssupported at diiferentparts of the member 10. Thesupported 4parte of thelms are denitely and y so that the films are definitely fed by rotationof the member 10 and cannot possibly slip or shift in position on themember 10. During operation the illuminating means 1l operates toilluminate the desired part of the supported portion of the negativefilm N and the member 10 is rotated causing both of the films to be fedor advanced at exactly the same rate and to exactly the same degree.

It will be obvious, of course, how the light.

from the illuminated part of the negative film is directed by thereflectors and lens device 15 onto the desired part of the supportedportion of the positive film P. In the present case the two films arefed in opposite directions by the member 1() so therefore the lensdevice 15 is one which will invert the image being printed from thenegative film onto the positive film so that the pictures on thepositive film are of the desired arrangement.

In Figs. 3 and 4 of the drawings I illustrate a form of the invention inwhich the member 10L is ofsomewhat different formation and constructionthan the member l0 hereinabove described. it being such as to allowlight from the illuminated part of the negative film to pass in astraight line through the lens device 15a onto the desired part of thepositive film P. The member 10a is a wheel-like member embodying twospaced flat annular parts 19a, a plurality of small thin bars connectingthe parts 19n at their peripheries, teeth 24 provided on the peripheriesof the parts 19a, and hollow trunnion parts 18 extending outwardly fromthe inner periphery of the parts 192A The openings in the trunnion parts18*1 are sufficiently large to pass the lens mechanism 15a to allow itto be arranged in the proper position between the supported portions ofthe films. The trunnion parts 18a are rotatably carried in suitablestandards 22a eX- tendingfrom the base Q3. One of the trunnion parts 18nis provided with a worm wheel 8O which meshes with a worm 81 mounted onthe drive shaft 82. The bars 70 connect and tie together the parts 19,yet are not sufficiently thick to interfere with theoperation of thedevice. In practice the bars TOare so spaced and the films are soarranged in connection with the member 1()a that the bars T0 comebetween adjacent pictures on the film and therefore do not interferewith the printing. 'Ihe other partsof this form of the invention may besubstantially the same as the corresponding parts in the form of theinvention first described.

In operation this form of the invention is substantiallyA the same asthe one first described except that. the light from `the illaminatedpart of the negative film N passes straight from the illuminated part ofthe negative film through the lens device 15a to the desired part of thepositive film.

Having described only typical embodiment-s of my invention Ido ynot wishto limit myself to the particular details hereinabove ser forth but wishto reserve to myself any changes or variations that may appear to thoseskilled in the art and that may fall within the scope of the followingclaims.

Having thus described a preferred form cf my invention, I claim:-

1. In a print-er of the character described, a single moving memberadapted to support films in definite spaced relation, means forilluminating one film, and a lens between the films to pass light fromthe illuminated film to the other film.

2. In a printer of the character described, a single rotating memberadapted to carry films in definite spaced relation, means forilluminating one of the films'while it is carried by said member, and alens between the film carrying parts of said member to pass light fromthe illuminated film to the other film.

3. In a r.printer of the character described, a singlel rotating wheellike member adapted to carry films in definite spaced relation, meansfor illuminatingI one film, and a lens within said member for passinglight from the illuminated film to the other film.

4. In a printer of the charac-ter described, a single rotating wheellike member adapted to carry films in definite spaced relation 'atsubstantially diametrically opposite points, means for illuminating onefilm, and a lens'within said member for passing light from theilluminated film to the other film.

5. In a printer of the character described. a single moving memberhaving two spaced parts adapted to support films by their edges' and indefinite spaced relation, means for illuminating one film, and a lensbetween the films to pass light from the illuminated film to the otherfilm.

6. In a printer ofthe character described, a single member operating tosupport and advance two films in definite relation to each other, meansfor illuminating one film. and a lens between the films to pass lightfrom the illuminated film to the other film.

7. In a printer of the character described, a single rotating member,means for holding films in supported engagement on said member, meansfor illuminating one film, and a lens between the films to pass lightfrom the illuminated film to the other film.

8. In a printer of the character described', a single rotating member,means for holding films in supported engagement with said 23 member atpoints where said member 1s moving in different directions, means forilluminating one film, and a lens between the films to^ passlight fromthe illuminated film to the other film.

9; In a printer of the character described,

` a single rota-ting member, means for holding films in supportedengagement-With said memberat points where said member is moving indifferent Y directions, means whereby the supported films move with saidmember, means for illumlnating one film, and a lens between the-filmstopass light from the illu- -minated film to the other film.

1U.' In a printer of the character described. a single moving memberadapted to support films in definite spaced relation, means for.

12. In a printer of the character described,`

a single rotating member, rollers for guiding and holdingtwo film stripsin supported engagement with said member, means for illuminating onefilm, anda lens between the films topass light from the illuminated filmto the other film.

13. In-a printer of the character described, a single moving memberadapted to support film in definite spaced relation, means forilluminating only a part of one of the films, and a lens betweenthefilms to pass light from the illuminated part of said film to the otherfilm.

14. In`a printer'of the character described, a single moving memberadapted to support films in4 ldefinite'spaced relation, means forilluminating one film, and an adjustable lens between the films to passlight from the illuminated film to the other film.

15. In a printer of the character described, a single moving memberadapted to support films in definitel spaced relation, means forilluminating one film, a lens, and means for reflecting light from theilluminated film so that it passesthrough the lens and to the otherfilm.A f

` 16. In a printer of the character described, a. single moving memberadapted to support films in definite spaced relation, means forilluminating one film, a lens, means for refiecting light from. theilluminated film through the lens, and means for reflecting' light fromthe lens to the other film. i

17. In a. printer of the character def/scribed,

a single moving member adapted t'o support filmsin definite spacedrelation, an illuminant located outside one of the films in ilvluminating relation thereto, and a lens be- =tween the films positionedto project the image of the illuminated film ,onto the other one. i

18. In a printer of' the character described,

i a single rotating member, means for holding a single film movingmember adapted to support and move two films in definite spacedapartrelation, means for illuminating one film and means located between thesaaced -lm for forming an image of the illuminated film on the otherfilm..

20. A printing apparatus comprising a feed member, acting on a negativefilm at one side and on a positive film at the other side with a lensbetween the sides of said feed member and a source of light outside thenegative film in substantial alignment with said lens.

21. Apparatus according to claim 20 in which the feed member comprisesduplex sprocket wheels adapted to-feedthe films in opposite directionsand at the same speed at its opposite sides with the lens locatedbetween said wheels and midway between the films acted on thereby.

22. In a printer of the character described, a single member adapted tosupport and move two films inA definite spaced relation, means forforming an image of one film on the other, and means for adj ust-ing thein'iage forming means to the distance between the two films.

23. In a printer'of the character described, means for supporting andmoving two films in spaced andsubstantially parallel relation. an imageforming lens between the two films, with its axis perpendicular to thefilms, a reflect-or at each end of the lens, set at substantially fortyvfive degrees to the lens axis,

two other reflectors set between the films at substantially forty fivedegrees to the lens axis, and means to move the lens and the two firstmentioned reflectors together in a direc-- tion substantially parallelto the films.

In witness that I claim the foregoing I have hereunto subscribed my namethis 29th day of Aug., 1922.

GEORGE A. MITCHELL.

